Being
able to make your own water means that you have to carry less with you.
This means not needing a 150 gallon fresh water tank under your RV. That is less drag, better gas mileage and less stress in the frame of your RV.
Being
able to make your own water means that you also don't need to carry
with you bottles of water which takes up limited space.
You
will also be able to spend time at those beautiful remote places you
love to visit, as you will not need to worry about running out of water.
With boating, well, you desalinate? Right? If you read the
desalination page, the brine that is being put back into the ocean kills the delicate smaller marine and plant life. There is enough water
OVER the ocean to extract without harming the delicate ocean salinity.